[TUHS] Systematic approach to command-line interfaces

[Douglas McIlroy]

> one other thing that SLS breaks, for data files, is the whole Unix 'pipe'
> abstraction, which is at the heart of the whole Unix tools paradigm.

Multics had an IO system with an inherent notion of redirectable data
streams. Pipes could have--and eventually did (circa 1987)--fit into
that framework. I presume a pipe DIM (device interface manager)
was not hard to build once it was proposed and accepted.

Doug